Now showing items 1-7 of 7

    • Co-location of lightning leader x-ray and electric field change sources 

      Howard, John J.; Uman, Martin A.; Dwyer, Joseph R.; Hill, Dustin; Biagi, Christopher J.; Saleh, Ziad H.; Jerauld, Jason E.; Rassoul, Hamid K. (2008-07-11)
      Using an eight-station time of arrival (TOA) network composed of NaI(Tl) scintillation detectors and wideband electric field derivative (dE/dt) antennas covering approximately 1 km² on the ground, we have located both the ...
    • Properties of the X-ray emission from rocket-triggered lightning as measured by the Thunderstorm Energetic Radiation Array (TERA) 

      Saleh, Ziad H.; Dwyer, Joseph R.; Howard, Joseph S.; Uman, Martin A.; Bakhtiari, Mohammad Reza; Concha, D; Stapleton, Michael V.; Hill, Dustin; Biagi, Christopher J.; Rassoul, Hamid K. (2009)
      The Thunderstorm Energetic Radiation Array (TERA) is located at the University of Florida, Florida Tech International Center for Lightning Research and Testing (ICLRT) at Camp Blanding, Florida. The array includes forty-five ...
    • The rarity of terrestrial gamma-ray flashes 

      Dwyer, Joseph R.; Schaal, M. M.; Saleh, Ziad H.; Cramer, Eric S.; Rassoul, Hamid K.; Hazelton, Bryna J.; Zhang, Z. Y.; Splitt, Michael E.; Lazarus, Steven M.; Ulrich, W. (2011-04-22)
      We report on the first search for Terrestrial Gamma-ray Flashes (TGFs) from altitudes where they are thought to be produced. The Airborne Detector for Energetic Lightning Emissions (ADELE), an array of gamma-ray detectors, ...
    • RF and X-ray source locations during the lightning attachment process 

      Howard, Joseph S.; Uman, Martin A.; Biagi, Christopher J.; Hill, Dustin; Jerauld, Jason E.; Rakov, Vladimir A.; Dwyer, Joseph R.; Saleh, Ziad H.; Rassoul, Hamid K. (2010-03-18)
      Using an eight-station array of electric field derivative (dE/dt) sensors and colocated NaI X-ray detectors, we have obtained 3-D RF source locations during the leaders and attachment processes of three first strokes ...
    • Runaway breakdown in the Jovian atmospheres 

      Dwyer, Joseph R.; Coleman, Lee M.; Lopez, Ramon E.; Saleh, Ziad H.; Concha, D.; Brown, Michael G.; Rassoul, Hamid K. (2006-11-30)
      Using detailed Monte Carlo calculations, the properties of runaway breakdown in the atmospheres of the four gas giant planets in our solar system are investigated, and the runaway avalanche lengths and average runaway ...
    • Spatial and energy distributions of X-ray emissions from leaders in natural and rocket triggered lightning 

      Schaal, Meagan M.; Dwyer, Joseph R.; Saleh, Ziad H.; Rassoul, Hamid K.; Hill, Jonathan D.; Jordan, Douglas M.; Uman, Martin A. (2012)
      Energetic radiation is known to be produced by lightning. To investigate these emissions, ground-based observations are being conducted at the International Center for Lightning Research and Testing (ICLRT) at Camp Blanding, ...
    • X-ray bursts produced by laboratory sparks in air 

      Dwyer, Joseph R.; Rassoul, Hamid K.; Saleh, Ziad H.; Uman, Martin A.; Jerauld, J.; Plumer, J. Anderson (2005-10-22)
      X-ray observations were made during fourteen 1.5 to 2.0 m high-voltage discharges in air produced by a 1.5 MV Marx circuit. All 14 discharges generated x-rays in the ∼30 to 150 keV range. The x-rays, which arrived in ...